package com.fight.util;

import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ImportExcelUtil {

	
	
	  private final static String excel2003L =".xls";    //2003- 版本的excel  
	  private final static String excel2007U =".xlsx";   //2007+ 版本的excel  
	
	  /** 
	     * 描述：获取IO流中的数据，组装成List<List<Object>>对象 
	     * @param in,fileName 
	     * @return 
	     * @throws IOException  
	     */  
	    public  List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{  
	        List<List<Object>> list = null;  
	          
	        //创建Excel工作薄  
	        Workbook work = this.getWorkbook(in,fileName);  
	        if(null == work){  
	            throw new Exception("创建Excel工作薄为空！");  
	        }  
	        Sheet sheet = null;  
	        Row row = null;  
	        Cell cell = null;  
	          
	        list = new ArrayList<List<Object>>();  
	        //遍历Excel中所有的sheet  
	        for (int i = 0; i < work.getNumberOfSheets(); i++) {  
	            sheet = work.getSheetAt(i);  
	            if(sheet==null){continue;}  
	              
	            //遍历当前sheet中的所有行  
	            for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum(); j++) {  
	                row = sheet.getRow(j);  
	                if(row==null||row.getFirstCellNum()==j){continue;}  
	                  
	                //遍历所有的列  
	                List<Object> li = new ArrayList<Object>();  
	                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {  
	                    cell = row.getCell(y);  
	                    li.add(this.getCellValue(cell));  
	                }  
	                list.add(li);  
	            }  
	        }  
	       
	    
	        return list;  
	    }  
	      
	  
	  /** 
	     * 描述：根据文件后缀，自适应上传文件的版本  
	     * @param inStr,fileName 
	     * @return 
	     * @throws Exception 
	     */  
	    public  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{  
	        Workbook wb = null;  
	        String fileType = fileName.substring(fileName.lastIndexOf("."));  
	        if(excel2003L.equals(fileType)){  
	            wb = new HSSFWorkbook(inStr);  //2003-  
	        }else if(excel2007U.equals(fileType)){  
	           wb = new XSSFWorkbook(inStr);  //2007+  
	        }else{  
	            throw new Exception("解析的文件格式有误！");  
	        }  
	        return wb;  
	    }  
	    
	    /** 
	     * 描述：对表格中数值进行格式化 
	     * @param cell 
	     * @return 
	     */  
	    public  Object getCellValue(Cell cell){  
	        Object value = null;  
	        DecimalFormat df = new DecimalFormat("0");  //格式化number String字符  
	        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化  
	        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字  
	          
	        switch (cell.getCellType()) {  
	        case Cell.CELL_TYPE_STRING:  
	            value = cell.getRichStringCellValue().getString();  
	            break;  
	        case Cell.CELL_TYPE_NUMERIC:  
	            if("General".equals(cell.getCellStyle().getDataFormatString())){  
	                value = df.format(cell.getNumericCellValue());  
	            }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){  
	                value = sdf.format(cell.getDateCellValue());  
	            }else{  
	                value = df2.format(cell.getNumericCellValue());  
	            }  
	            break;  
	        case Cell.CELL_TYPE_BOOLEAN:  
	            value = cell.getBooleanCellValue();  
	            break;  
	        case Cell.CELL_TYPE_BLANK:  
	            value = "";  
	            break;  
	        default:  
	            break;  
	        }  
	        return value;  
	    }  
}
